
4026-0XX
Operator Panel Service Check
1
FRU | Action |
Operator | LEDs |
Panel Assem- | Be sure the operator panel cable is properly |
bly | seated in J5 on the controller board. |
| Run POST and check each LED for proper |
| operation. |
| If more than one LED does not light or an indi- |
| vidual LED stays on solid during POST, replace |
| the following FRUs one at a time in the order |
| shown: |
| Controller board |
| Operator panel |
| If all LEDs are very dim and operate erratically |
| during POST or all LEDs come on and stay on |
| solid during POST replace the following FRUs |
| one at a time in the order shown: |
| Operator panel assembly |
| Controller board |
| If none of the LEDs are on, be sure +5 V dc is |
| present at |
| rect, replace the operator panel assembly. If |
| incorrect, replace the controller board. |
| If all the LEDs come on and remain on, replace |
| the following FRUs one at a time in the order |
| shown: |
| Operator Panel Assembly |
| Controller Board |
| Button Inoperative |
| Disconnect the operator panel cable at J5 on the |
| controller board. Check the continuity between |
| |
| ton. The meter should read from approximately |
| 10K ohms to approximately zero ohms when the |
| button is pressed. |
| If the continuity is incorrect, replace the operator |
| panel assembly. If correct, replace the following |
| FRUs one at a time in the order shown: |
| Operator Panel Assembly |
| Controller Board |
|
|